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Finding the Fourth Proportional to 900.66, 1,242.06 and 801.12

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Solution

The fourth proportional to 900.66, 1,242.06 and 801.12 is: 1,104.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    900.66 : 1,242.06 = 801.12 : x
  2. Step 2: Convert to fraction form
    900.66/1,242.06 = 801.12/x
  3. Step 3: Cross multiply
    900.66x = 1,242.06 × 801.12
  4. Step 4: Simplify right side
    900.66x = 995,039.11
  5. Step 5: Solve for x
    x = 995,039.11/900.66
  6. Step 6: Final answer
    x = 1,104.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.